On 28 Feb 2001, at 11:01, Reef Fish wrote:

> On Wed, 28 Feb 2001 08:22:08 -0600, Mike <[log in to unmask]> wrote:
>
> >> >It seems to me that, in part, much will depend on the intensity and
> >> >profiles of the diving over the preceeding days as well as the
> >> >algorithm of the computer - something that fails to consider individual
> >> >physiology.
> >
> >Another thing to consider is what you body is telling you after
> >agressive profiles. I think that many divers fail to read the signs that
> >their body is giving them.
>
> There is even a term "bio-feedback" for this sort of listening to
> your own body.

That's a good term for it.


>
>
> >If you are feeling progressivly more
> >"fatigue" after several dives over a few days then you should allow
> >more time for your body to recover. This is something that you can
> >feel but the algorithm of your computer can't.
>
> Excellent point to bring out.  EXTREME fatigue (though short lasting)
> is one of the unmistakable signs of "marginal bends".  So are
> non-lasting shoulder aches, and others.  When your BODY is not
> feeling tip-top shape, listen to what it's trying to tell ya.  :-)

Term for this is sub-clinical DCS.
>
>
> Here's a lesson *I* learned about computer diving.  The ORCA algorithm
> (for no-deco, no gas mix) is unquestionably the MOST RELIABLE and TIME
> TESTED algorithm to date.  It had been through millions of dives over
> the years by recreational as well as professional divers with no
> obvious quirks.  That's why I still carry two, on long series of
> repetitive dives on liveaboards.

I certainly understand the time tested part of this statement. From
wence does the most reliable come from though?


>
> So much for the background.  In July 1997, I decided to do my "wall
> research" in Cozumel.  :-)  For 21 consecutive days, my shallowest
> first dive was the one to Devil's Throat (130-ish).  The other
> 20 days were short bounces to max depths between 190 and 200 fsw. :-)
>
> On EACH day, I did only two dives, and the "wait to fly" time was
> usually around 6-7 hours.  So, to conserve battery, instead of letting
> it run till it reach the "turn me off" point, I turned the computer
> off each day and re-started on the next day.

So the computer did not have the correct information to feed it's
algorithm with. :-)